Yealink SIP-T20P, SIP-T22P, SIP-T26P, SIP-T28P, SIP-T32G, SIP-T38G, SIP-T41P. Cisco 7902, 7905, 7905G, 7906G, 7910, 7911, 7912, 7932G IP Phones. This AddCom ADD770 Binaural Noise-Canceling Headset with ADDQD-04 Cable is NOT compatible with Cisco 6921, 6941, 7940, 7960, 7970, 8941, 9951 IP Phones.
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